| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a holding mechanism for a filter lens, which is configured such that, when a filter lens is mounted and fixed in a filter lens frame body, the flatness of the filter lens is not affected. <P>SOLUTION: An inside diameter part of the filter lens frame body has a filter lens fitting part and a lens pressing edge part to which a circumferential part of a circular filter lens to be attached can be joined, and its front is locked by the lens pressing edge part. The rear side of the circular filter lens fitted in the filter lens fitting part is caught by a pressing ring fitted in a pressing ring groove formed in the inside diameter part of the filter lens frame body. <P>COPYRIGHT: (C)2013,JPO&INPIT |
